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G. F. WHEELER.

COMBINED MARKING GAGE AND COMPASSES.

APPLICATION FILED OCT. 20, I914.

Patented Aug. 22, 1916.

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G. F. WHEELER.

COMBINED MARKING GAGE AND COMPASSES.

APPLICATION FILED OCT. 20, 1914.

1,195,886. Patented Aug. 22, 1916.

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UNITED STAT T PATENT CFFTCE.

COMBINED MARKING-GAGE AND COMPASSES.

Specification of Letters Patent.

Patented Aug. 22, 1916.

Application filed. October 20, 1914. Serial N 0. 867,680.

To all whom it may concern:

Be it known that I, Gnonon F. \VHEELER, subject of the King of Great Britain, residing at Lilydale, Province of Saskatchewan, Canada, have invented certain new and useful Improvements in Combined Marking- Gages and Compasses, of which the following is a specification.

This invention relates to an improved combined marking gage and compass and has as its primary object to provide a device of this character which will be light, simple in construction, and which may be readily adapted for use as a marking gage, or with equal facility, be used as a compass.

The invention has as a further object to provide in a device of this character, a detachable mounting for the marking disk employed, so that said disk may be readily removed in case it becomes worn or in case of breakage.

A further object of the invention is to provide a device of this character wherein the guide block or slide of the gage will be provided with rotatable elements arranged to contact with the work so that the gage may be moved freely upon the work. And the invention has as a still further object to provide a construction wherein the rotatable ele ments carried by the guide block or slide of the gage, will be detachably mounted so that said elements may be readily removed when desired.

With these and other objects in view my invention will be more fully described, illustrated in the accompanying drawings, and then specifically pointed out in the claims which are attached to and form a part of this application.

In the accompanying drawings :F1gure 1 is a perspective view showing my improved device arranged for use as a marker, Fig. 2 is a similar view showing the device arranged for use as a compass, Fig. 3 is a top plan View partly broken away, illustrating the compass slide, Fig. i is a vertical section taken through the compass slide, Fig. 5 is a vertical section taken through the guide block of the marker and illustrating such block mounted in operative position; this view also showing the arrangement of the rotatable elements carried by said block with relation to the bar carrying the block, Fig. 6 is a front elevation of the guide block for the marker, the bar upon which the block is mounted being shown in section, this view also illustrating the relative arrangement of in all the views of the drawings by the same reference characters.

In designing my improved marking gage and compass, 1 have sought to provide a construction which will be relatively light but which will, at the same time, be entirely eflicient, and while certain parts of the device are preferably constructed of relatively light material accordingly, still, I provide a special mounting for the movable parts carried thereby, the said mountings being of such material as to form a strong and durable structure.

Referring more particularly to the draw ings, I employ a straight bar or stock 10 which may be of any desired length and which is preferably rectangular in cross section, as shown, and is provided with flat side faces. The bar 10 is preferably formed of steel or other suitable material and upon its upper face 11 is provided with graduations of any desired character.

Adjacent one end, the bar 10 is laterally enlarged as shown at 12 and formed in said laterally enlarged portion of the bar and in the body portion of the bar proper, are intersecting transversely and longitudinally extending slots 13 and 14, the said slots opening through the opposite side faces of the bar and providing a socket for the marking disk 15.

The marking disk 15 is preferably formed 1 L, while the trunnion 17, at its free end is provided with a longitudinally extending conical notch which is disposed to receive the inner tapered extremity of a set screw The set screw 20 is disposed to engage within a suitable threaded bore formed in the outer end wall of the slot 1a to extend in alinement with the trunnions 17 and 18, and mounted upon the outer extremity of said set screw 20 to engage against the adj acent extremity of the bar 10 is a lock nut 21, which is preferably knurled upon its peripheral face to be easily engaged by the fingers. The marking gage 15 is thus mounted for rotation upon the bar 10 and it will be observed that the periphery of said disk is arranged to project laterally of the side faces of the bar to engage the work.

As will be readily obvious, the marking disk 15 may be readily removed by releasing the nut 21 and by then moving the set screw 20 to free the trunnion 17 when the said disk may be entirely displaced. This is obviously a very simple arrangement and at the same time, a very advantageous one, since it permits easy replacement of the disk 15 in case of breakage.

In the use of my improved device as a marking gage, I provide aguide block or slide 22 which has an opening 23 extending medially therethrough to receive the bar 10, the said block being detachably mounted upon the bar and being slidable freely longitudinally thereon. The guide block 22 is preferably formed of aluminum although any other suitable material may be employed. Arranged medially within the upper edge of the block 22 is a bushing 24, preferably of steel, the said bushing being externally screw threaded to engage within a suitable bore formed in the block and being internally screw threaded to receive a set screw 25, the said set screw 25 being formed with a head 26, whereby it may be easily turned. The set screw 25 is adjustable within the bushing 2% to engage the upper face of the bar, as shown in Fig. 5 of the drawings, so that the guide block 22 may be secured in any desired adjusted po- 'sition with relation to the marking gage 15,

upon the said bar.

The inner side face 27' of the guide block 22 is flat and detachably mounted to project laterally from said face are spaced hori- Zontally arranged rollers 28, one of said rollers being disposed on each side of the bar 10. Each of said rollers is mounted to turn upon a pin 29 the said pins being each provided, at one extremity, with a terminal head 30 having flat sides to receive a wrench or other tool and being screw threaded adjacent the opposite extremity thereof to engage within a suitable threaded aperture formed in the block 22. The rollers 28 are disposed in the same plane andat opposite sides of the bar 10 and are arranged to project upon their lower sides below the lower face of the bar, as best shown in Figs. 5 and 6 of the drawings, the said rollers being adapted to engage the work to move freely thereover in the practical use of the device.

At its ends, the block 22 is recessed to provide longitudinally extending arms 31 and mounted between said arms, at each end of the block, is a roller 32. Preferably, the rollers 32 are each provided with longitudinally extending conical notches or recesses in the ends thereof, which are disposed to receive set screws 33, the said set screws being provided, at their extremities, with tapered ends disposed to engage within said recesses. The set screws 33 are adjustably mounted within suitable screw threaded openings formed in the arms 31, and are preferably provided at their outer ends with notches to receive a screw driver or other tool. It will be noted that the rollers 32 may be readily removed when desired and attention is now called to the fact that said rollers are arranged to extend parallel to the inner face 27 of the block 22 and to project, at one side thereof, laterally of said face and contigw ous to the rollers 28. This is best shown in Figs. 5 and 7 of the drawings. The rollers 32 are arranged to coact with the rollers 28 in engaging the work. In use, the rollers 28, as will be clear, are arranged to bear upon the upper face of the work while the rollers 32 will bear against the adjacent edge of the work. It will thus be seen that the block 22 is adapted to be moved freely over the work to effect the movement of the marking disk 15 thereon. In this connection, attention is called to the fact that, under normal conditions, the marking oisk 15 is mounted to rotate freely, but if desired, the set screw 20 may be adjusted inwardly to bind the trunnions of the disk to hold it stationary, when the disk may be used to score the work.

In connection with the bar 10, I also employ a sleeve 3%, which is preferably formed of bra ss and which is detachably and slidably mounted upon the bar, the said sleeve having an opening medially formed therein to receive the bar. The sleeve 3% is preferably formed with substantially fiat side faces and upon its lower face is formed with a boss 35. with a suitable bore and screw threaded into said bore is a stud or pin 36. The pin 36 is thus preferably detachably connected with the sleeve 34 and at its outer end is provided with a sharp point, the said stud being preferably formed of steel or some other suitable relatively hard material.

Upon its upper face, the sleeve 34 is provided with a boss 37, which is formed with an internally screw threaded opening communicating with the opening formed in the The boss 35 is provided" sleeve to receive the bar 10, and mounted within said opening is a set screw 38, the shank of said screw 38 being threaded to engage the threads of the opening.

As best shown in Fig. 4 of the drawing, the set screw 38 is disposed to engage against the upper face of the bar 10 to maintain the sleeve 34 in various adjusted positions upon the bar 10 relative to the disk 15, and preferably, the sleeve 34 is provided with a sight opening 39 through which the graduations upon the bar 10 may be observed one end wall of said sight opening being disposed in substantial registry with the pin 36 for a reason which will be clear. The set screw 38 is formed with an elongated cylindrical stem 40 which is preferably reduced at its upper extremity, as shown at 41, and formed on said stem, adjacent the inner extremity thereof is an annular enlargement 42, which is preferably knurled upon its peripheral face and provides a head for the set screw 38, by which the said set screw may be readily adjusted with the fingers.

lVhen it is desired to use the device as a compass the block 22 is removed from the bar 10 and the sleeve 34 is positioned thereon. As will be clear, the pin 36 may then be engaged with the work and by holding the stem 40 of the set screw 38 in the left hand, the bar 10 may then be moved to cause the marking disk 15 to describe a circle about the said pin, the bar pivoting upon the pin. It will be seen that by adjusting the sleeve 34 longitudinally upon the bar 10, the device may thus be adapted for a relatively large range of use, and that either the block 22 may be readily positioned upon the bar to provide a marking gage or the sleeve 34 may be positioned thereon to provide a compass. lVhen the device is used as a marking gage and the block 22 is positioned upon the bar 10, the presence of the sleeve 34 upon the outer extremity of said bar will not interfere with the operation of the gage. The several parts of the device may, therefore, under normal conditions, be thus assembled.

It will therefore be seen that I provide a very simple and efiicient construction for the purpose set forth which will be relatively light and which may be readily adapted for use, either as a marking gage or as a compass.

Having thus described my invention, what I claim and desire to secure by Letters Patout is 1. A device of the character described including a support, a rotatable marking element having a bearing in the support, and

means carried by the support and providing a bearing for the marking element coacting with said first mentioned bearing, the said means being adjustable upon the support for binding the marking element between the said means and the support.

2. A device of the character described including a support, a marking element carried thereby and having a bearing in the support, and means adjustable upon the support to provide a bearing for the marking element coacting with said first mentioned bearing for rotatably supporting the marking element at spaced points between the said bearing and the support.

3. A device of the character described including a support, a marking element carried thereby and provided with trunnions, and a pin carried by the support and engaging one of said trunnions with the other of sald trunnions engaging the support for ro tatably supporting the marking element.

4. A device of the character described including a stock having an opening formed therein, a marking element rotatably mounted in said opening, said marking element including a disk having trunnions formed thereon with one of said trunnions engaging one wall of said opening, means adjustable upon the opposite Wall of said opening and engaging the other trunnion of said disk, and a guide block carried by the stock and adapted to cooperate with said marking element. 7

5. A device of the character described including a stock, a marking element carried 7 thereby, means adjustable upon the stock to cooperate therewith for suspending the marking element therebetween and the stock, locking means adjustable upon said first mentioned means and adapted to engage the stock for maintaining said first mentioned means in adjusted position, and a guide block carried by the stock and adapted to cooperate with said marking element.

6. A device of the character described including a stock, a marker carried thereby, a guide block carried by the stock and adapted to cooperate with said marker, and rotatable work engaging elements carried by said block, the block being adapted to cooperate with the work with one of said elements engaging an adjacent edge of the work and with the other of said elements en- GEORGE F. WHEELER. L 8.]

Witnesses:

JEssE S. WHEELER, CYRIL. H. J ONES.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

